(E)-N1-(4-Chlorobenzylidene)-N4-Phenylbenzene-1,4-Diamine as Mild Steel Corrosion Inhibitor in 1M HCl

Abstract

The efficiency of novel Schiff base namely (E)-N1-(4-chlorobenzylidene)-N4-phenylbenzene-1,4-diamine (K2) investigated as corrosion inhibitor of mild steel in 1M HCl using polarization technique, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The results showed that this inhibitor behaved as a good corrosion inhibitor even at low concentration. Polarization curve indicate that K2 generally is mixed inhibitor, which act dominantly as cathodic inhibitor. Polarization technique and EIS tested in different concentrations reveal that this compound is adsorbed on the mild steel, therefore blocking the active sites and the adsorption follows Langmuir adsorption isotherm model.